Valve stem and adapter



April 4, 1933. J. c. CROWLEY VALVE STEM AND ADAPTER Filed Nov. l, 1929 2 Sheets-Sheet.l l

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Invenor JOHN C. @Rom/L EY.

April 4, 1933. J. c. CROWLEY VALVE STEM AND ADAPTER Filed Nov. 1, 1929 2 Sheets-Sheet. 2

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r I Afm L z Im@ 0 u a NW M J trated in the accompanying 25- Patented pr. 4, 1933 UNITED-STATES PTNT OFFICE i FACTURIN G COLEPANY, OF CLEVELAND, OHIO, A CORPORATION OF OI-IIO` vALvEsTEM AND ADAPTER 4Application 'led November This invention relates to a valve stem and, more particularly to a valve stem provided with an adapter or extension whereby a valve stem of other than the usual standard con-y struction of valve stem may be equipped to use a standard valve insides.

An object of the invention is to provide a valve stem and an adaptery or extension therefor which are so constructed that pneumatic tire tubes equipped with such stems may be interchangeably used on different types of Wheels. l

Another object is to provide a valve stem and an adapter or extension therefor which areY so constructed that the adapter maybe assembled with the stem so as to have that portion of the adapter containing the valve insides located in any desired position with Vthe parts, when thus assembled, held against relative rotation.

Additional objects and advantagesv will become apparenthereinafter. y

Embodiments of the invention are illusdrawings wherein* .-z

Fig. l is a. sectional view of the assembled valve stem, a portion of the adapter, and the nut for holding the stem and adapter in assembled position;

Fig. 2 is a sectional view of the valve stem;

Fig. 3 is a horizontal sectional view taken approximately on line 3 3 of Fig. 2, the spreader plate at the inner end of the valve stem being omitted in this view;

Fig. 4 is a fragmentary side elevation of the adapter or extension;

Fig. 5 is a horizontal sectional viewtaken on line 5-5 of Fig. h'showing the formation of a portion of the adapter;

Fig. 6 is asectional view of a"modified form, showing the assembledvalve stem, a portion of the adapter. and the nut for hold'- ing the stem and adapter in assembled position; i

Fig. 7 is a sectional view of the valve stem of Fig. 6;

Fig. 8 is a top plan view of the stem, the

spreader omitted;

Fig. 9 is a fragmentary side elevation of plate at .the inner end thereof being 1, 1929.Y seal No. 403,996.

and 1 Fig. 10 is a horizontal sectional view taken on line 10-1O of Fig. 9. i

As is well known, the 4conventional type of valve stem is made of a tubular piece of JOHN C. CROWLEY, OF CLEVELAND HEIGHTS, OHIO,'ASSIGNOR TO THE DILL MANU- l brass which has., an externally threaded por-v f tion at one end of reduced diameter. The valve stem is formed with a tapered shoulder adjacent its outer 4end arranged in the central bore through the stem, which shoulder is'adapted to receive the portion of a standard valve insides.

brass in removal of the valve insides and prevent ,the insides from becoming frozen within the stem after they have` been inserted therein a long period of time and" subjected to use and weather conditions. i

These valve stems are made of The construction described herein relates.

toa valve stem made of steel or other suitable metal and an adapter or extension formed of non-corroding metal, suchv asy brass.- j Y v There are; certain types of wheels which require that the portion ofthe valve stem containing the-valveinsides be located adjacent ther-iin ange of the Wheel. This has necessitated the use of different stems upon-l tire Vtubes which are'to be used withsuch wheels, as heavy disk wheels,`than areeusualA ly used` upon the ordinary spoke type of wheel. This is because in theordinary spoke type of wheel, the valve stemmay be straight,

while in the Vspecial types of wheels, referred` to above, it is necessary to locate vthe valve insides adjacent the rim flange of the wheel and, therefore, such insides are notin axial alignment with the valve stem. -This has required the use of a bent adapter or exten` sion in order to the proper location.' Evenwhen using such an adapter or extension, yit is necessary tor vary the position of the end providedwith an end part order to permit `of easy Vinsertion orV position the valve insides at thereof which contains the valve insides with dierent wheels or types of wheels and considerable v difficulty has arisen in assembling the extension and stem to attain this proper p0`sition of the end of the extension and, at the same time, have the portions of the stemfand extension which maintain these members against relative rotation in the proper co operating relationship.

The present inventiony discloses Y a valve stem and an adapter or extension therefor which may be usedl upon tire tubes irrespective of the type of wheels upon which thel tubes are mounted and which arek so constructed as to enable the position of Ythe end of the adapter or extension to be varied as desired and yetv have the members mainltoaired against relative rotation when assem- The v valve steml is a tubular member provided with an internal bore 2 and having adjacent one of its ends a head 3 which is adapted to cooperate with a spreader plate later to be described, for clampingportions of an inner tube between the head and the spreader plate, as is well understood in the art. The other end of the .stem 1 is externally threaded at 4, while the bore 2 adjacent 25@1 such end is enlarged and is connectedto the smaller portion of the bore by a tapered Ashoulder 5. The stein 1 is provided with one ormore flats 6 on its exterior surface in order to maintain the spreader plate 7 in the eosproper position, such spreader plate having Y a central'opening provided with correspondn ing flats to cooperate with the flats 6 on the stem.

The enlarged portion ofthe bore of the 355ste1n 1 is vprovided with a circumferential continuousseries of grooves extending longi tudinally from the upper end of the stem to the tapered shoulder 5, these grooves being preferably formed as a series of inwardly @projecting longitudinally Vextending serrations 8. The adapter is indicated at 9 and is provided with a central bore :10 adapted kto communicate with the bore in the stem 1.

Preferably the adapter or extension is in the j kform of a single or double elbowrso that the portion of theV adapter which contains the valve insides will be located adjacent the rim flange of the wheel, but it should be understood in certain instances a straight adapter fwould be used. Of course, this portion of the adapter is suitably threaded for the reception of a suitable form of dust cap or closure member as is usual in such constructions.

VThe complete adapter has not been shown herein since the construction of the same is well understood in the art and since the novel portion thereof embraced by the present invention is located at the end of the'adapter that cooperates with the valve stem, which part of the adapter is straight and is pro- Y vided with an outwardly extending annular rib 11, inwardly ofthe end of the adapter, While the bore 10 adjacent this end is in- 65 ternallj7 threaded to receive :an externally threaded tubular member 12 having an annular shoulder 13 at its lower end for the purpose of maintaining a packing gasket 14 between the same and the lower end of the l adapter, such gasket being of slightly greater ydiameter than the diameter of a reduced portion 15 of the adapter.

Intermediate the rib 11 and the reduced portion 15 of the adapter a continuous series of outwardly projecting longitudinally ex.

together the stem and adapter. The adapter is preferably assembled with the nut as a unit, this being eected by inserting the end of the adapter through the nutV until the rib 11 engages the arm or rib19 of the nut and then forcing the arm or rib down upon the rib 11. When the adapter is tofbe assembled in the valve stem, it is arranged above the same so that the vend ofthe adapter containingthe valve insides is in the proper position, after which thev adapter is moved longitudinally into the stem with the grooves or serrations 16 of the adapter engaging in? the longitudinal'grooves or serrations 8 of the stem. Rotation ofthe nut 17 will cause the adapter to lmove longitudinally into the stem until Vit has been forced into the proper position with the vpacking 12 `engaging 'the reduced portion of the bore 2.

YIt will be apparent that while the grooves or y,serrations of the adapter and the stem prevent these members from having relative rotation, theydo not prevent the proper positioning of the adapter since the grooves or serrations being a continuous f series, the adapter maybe moved through three hundred and sixty degrees if necessary to prop#` erly position the end thereof and the vcooperating serrations will still effect'the function for which they Vwere designed.

In the form shown in. Figs. 6 to 10, in-l clusive, the valve stem 21 is a tubular member provided with'pan internal'bore 22 and having adjacentone of its ends a head 23 adapted to cooperate with a spreader plate, later to be described, for clamping portions of an inner Ytube between the head and the spreader plate, as is well understood in the art. The other end of the stem 21 is externally threaded at 24 while the bore 22 adjacent such end is enlarged, as indicated at 25, and is connected to the smaller portion of the bore by a tapered shoulder 26. The stem 21 is provided with one or more flats 27 onits external surface in order to main- CFL adapt-er or extension is indicated at and is provided with a central borev 3lV adapted,

when the nieml ers are assembled, to communi cate with the bore in the stem 21. Preferably, the adapter or extension is in the form of a single. or double elbow so that the portion of the adapter which contains the valve Y insides will be located adjacent the rim flange of the wheel, but it should be understood that in certain instances the straight adapter would be used. 0f course, this portion of the adapter is suitably threaded for the reception of a suitable form of dust cap or closure member as is used in such constructions.

The complete adapter has not been shown herein since the construction of the same is well understood in the art and since the novel portion thereof embraced by the present invention is located the end of the adapter that cooperates with the valve stem, such part of the adapter being straight and provided with an outwardly ext-ending annular rib 32 inwardly of the end of the adapter while 'the bore 3l adjacent this end is internally threaded to receive an externally threaded tubular member 33 having an annular shoulder 34 at its lower end, for the purpose of maintaining a packing gasket 35 between the same and the lower end of the adapter, such gasket being of slightly greater diameter than the diameter of the reduced portion 3G arranged at the end of the adapter. Between the reduced portion 36 and the rib 3Q, the adapter has a portion 37 of substantially the same diameter as the gasket 35, the circumference Y of such portion being smooth before the adapter has been assembled with the stem, A nut 38 having an enlarged portion internally threaded at 39 and a reduced upper portion provided with inwardly extending spaced arms or ribs 40 and Ll-l, which define an annular groove swivelly receiving the annular rib 32 on the adapter, is used for connecting together the stem and adapter. The adapter is preferably assembled with the nut as a unit, this being effected by inserting the end of the adapter through the nut until the rib 32 engages the arm or rib lll after which the arm or rib 40 of the nut is forced down upon the rib 32. Vhen the adapter Vis to be assembled in the valve stem itis arranged above the same with the end of the adapter `containing the valve insides in the proper 89 ofthe nut engage with the threads Ql'of Rotation of the nut will then causev the stem. the adapter to move longitudinally inwardly of the bore of thestem while the continuous circumferentialseries of inwardly projecting cutting teeth 29, adjacentthe upper end of the stem, lwill cut into the relatively soft metal of the portion 37 of the adapter and form an interlock which will maintain the stem andl adapter againstrelative rotation. Itwill thus be seen thatthe members when assembled will be held againstrelat-ive rotation but that it will be possible'to correctly position the valve insidesreceiving end of the adapter, since the adapter may be turned toany position `prior to insertion of theend thereof into the bore of the valvestem.

' Although preferred embodiments of the invention have been illustrated and described herein, it should be understood that the'same is susceptible of various modifications and adaptations within the scope ofthe appended claims. Y* p Having thus described my invention, what I claim is:

4 l. In combination, a valve stem having an eXteriorly threaded portion at one end and a head at the other Vend and provided with a bore extending therethrough, said bore adj acentthe eXteriorly threaded end of the stem being provided with a circumferential series of inwardlyl projecting teeth, an adapter having a bore extending therethrough and an end portion arranged in the bore of the valve stem, and a nut cooperating with the threaded portion of the valve stem and having a swiveled connection with the adapter for moving the end of the latter into the bore. of the stem and holding the stem and adapter assembled, said series of inwardly projecting teeth cutting into the end portion of the adapter and forming an interlock therewith to maintain the adapter and stem against relative rotation. f

2. `In combination, a valve stem having an eXteriorly threaded portion at one end and a head at the other end and provided with a bore extending longitudinally therethrough,

said bore having an enlarged portion the wall of which is provided with a circumferential series of longitudinally disposed serrations, an adapter having a bore extending longitudinally therethrough and a portion complementary to the enlarged portion of the stem bore and provided with a circumferential series of longitudinally disposed serrations complementary to the serrations in said enlarged portion of the stem bore, said adapter having an end portion which has an airtight fit within the valve stem bore, and a nut cooperating with the threaded portion of the valve stem and having a swivel connection with the adapter for moving the end portion of the latter into the. bore of the stem and holding the stem and adapter'assemloled.

' 3. In combination, a valve stem having an exteriorly threaded portion at one end and a head at the other end and provided with a bore extending longitudinally therethrough, said bore having an enlarged portion the Wall of which is provided With a circumferential series of inwardly extending serrations,an adapter having a bore eXtending longitudinally therethrough and a portion complementary to the enlarged portion of the stem bore and provided with serrations engaging the serrations in the stem horey to hold the stem and adapter against relative rotation, said adapter having an end portion Which has an air-tight fit Within the stem bore, and a nut cooperating With the threaded portion of the valve stem and having a swivel connection With the adapter for moving the end portions of the latter into the bore of the stem and holding the stem y.

and adapter assembled.

In testimony whereof, I hereunto affix my Signature JOHN o CROWLEY 

